Github user maropu commented on a diff in the pull request: https://github.com/apache/spark/pull/20345#discussion_r175971439 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala --- @@ -141,14 +141,16 @@ object ExtractEquiJoinKeys extends Logging with PredicateHelper { } /** - * A pattern that collects the filter and inner joins. + * A pattern that collects the filter and inner joins (and skip projections in plan sub-trees). --- End diff -- ok
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